Description
The Confederated Tribes of the Colville Reservation are seeking a qualified contractor to design and install engineered large‑wood structures, beaver‑dam analogues, and associated riparian planting on the Middle Sanpoil River (Reaches 4A and 4B). The work includes in‑water construction of engineered log jams, temporary stream diversions, site restoration, and post‑construction vegetation establishment, with strict environmental, cultural, and tribal‑preference requirements. The contract is fixed‑price, with a base‑bid for Reach 4A and an additive‑bid for Reach 4B, and must be performed primarily within the 2026 in‑water work window, though Reach 4B may extend into 2027.
• Construct engineered log jams, channel‑spanning ELJs, beaver‑dam analogues, and post‑assisted log structures using tribe‑provided logs and contractor‑supplied boulders.
• Perform vegetation management, planting, seeding, and site restoration to meet a 60 % plant‑survival guarantee.
• Obtain and comply with multiple permits (WSDOT, EPA NPDES, Corps 404, Tribal hydraulic and cultural permits) and adhere to Indian preference and Davis‑Bacon wage requirements.
• Provide engineering oversight (minimum two days per week) and submit progress‑based payments with 25 % retainage or performance bond.